Bryant 548J*14D Communication Wiring Protocols, General, Local Access, RTU-MP Troubleshooting

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Power Exhaust (output): Connect the accessory Power Exhaust contactor coil(s) per Fig. 46.

Power Exhaust

 

 

 

 

PEC

GRA

 

 

 

 

 

J11-3

 

 

 

 

 

 

 

 

CTB

 

 

 

 

THERMOSTAT

 

 

 

TAN

 

C

 

 

 

 

 

 

 

 

 

C10362

Fig. 46 - RTU-MP Power Exhaust Connections

Space Relative Humidity Sensor - The RH sensor is not used with 548J*14D models at this time.

Communication Wiring - Protocols

General —

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU-MP can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks. Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 47 for the switch setting

per protocol. The 3rd party connection to the RTU-MP is through plug J19.

NOTE: Power must be cycled after changing the SW1-3 switch settings.

Refer to the RTU-MP 3rd Party Integration Guide for more detailed information on protocols, 3rd party wiring, and networking.

Local Access —

BACview6 Handheld: The BACview6 is a keypad/display interface used to connect to the RTU-MP to access the control information, read sensor values, and test the RTU, see Fig. 48. This is an accessory interface that does not come with the MP controller and can only be used at the unit. Connect the BACview6 to the RTU-MP’s J12 local access port. There are 2 password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is idle. Contact your Bryant applications engineer for details on navigation and screen content.

Virtual BACview: Virtual BACview is a freeware computer program that functions as the BACview6 Handheld. The USB Link interface (USB-L) is required to connect a computer to the RTU-MP board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld.

RTU-MP Troubleshooting —

Communication LEDs The LEDs indicate if the controller is speaking to the devices on the network. The LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the LEDs will appear.

548J*14D

SW3 Protocol Selection

PROTOCOL

 

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

 

 

 

 

 

 

 

 

 

 

 

BACnet MS/TP

 

Unused

OFF

OFF

OFF

ON

OFF

Select Baud

Select Baud

(Master)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Modbus

 

Unused

OFF

OFF

ON

ON

OFF

Select Baud

Select Baud

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N2

 

Unused

OFF

OFF

OFF

ON

ON

OFF

OFF

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LonWorks

 

Unused

ON

ON

OFF

ON

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

NOTE:

 

 

 

 

 

 

 

 

 

 

DS = Dip Switch

 

 

 

 

 

 

 

 

 

 

BACnet MS/TP SW3 example shown

 

 

 

 

 

 

 

 

 

Baud Rate Selections

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BAUD RATE

 

DS2

 

DS1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9600

 

OFF

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19,200

 

ON

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

38,400

 

OFF

 

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

76,800

 

ON

 

ON

 

 

 

 

 

 

C07166

Fig. 47 - RTU-MP SW3 Dip Switch Settings

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Image 25
Contents Installation Instructions Safety Considerations Unit Dimensional Drawing Size 14 Unit Plan for Unit Location Service Clearance Dimensional DrawingInspect Unit Plan for Sequence of Unit InstallationProvide Unit Support Roof Curb Details Field Fabricate Ductwork For Units with Accessory Electric HeatersRig and Place Unit Install Outside Air Hood Convert to Horizontal and Connect Ductwork when requiredEconomizer Hood Removal and Setup Factory Option Positioning on CurbDamper Assembly Economizer Hood and Two-Position Hood Install External Condensate Trap and LineMake Electrical Connections Field Power SupplyMounting Position for Field Disconnects Over 100A Units with Factory-Installed Disconnect Units Without Factory-Installed DisconnectUnit Powered Convenience Outlet Wiring Factory-Option Thru-Base Connections Field Control WiringThermostat Units without Thru-Base ConnectionsUnit without Thru-Base Connection Kit Heat Anticipator SettingsHeater and Supplementary Fuses Single Point BoxesHeater Low-Voltage Control Connections Return Air Enthalpy Sensor Outdoor Air Enthalpy Control PNO 33CSENTHSWDifferential Enthalpy Control RTU-MP Control System RTU-MP System Control Wiring Diagram RTU-MP Controller Inputs and Outputs Supply Air Temperature SAT SensorSpace Temperature SPT Sensors Outdoor Air Temperature OAT SensorField Connections EconoMi$er2Indoor Air Quality CO2 sensor RTU-MP T-56 Sensor ConnectionsOutdoor Air Quality Sensor PNO 33ZCSENCO2 plus Connecting Discrete InputsWeatherproof enclosure Local Access Communication Wiring ProtocolsRTU-MP Troubleshooting GeneralLEDs on the RTU-MP show the status of certain functions LEDsSystem Smoke DetectorsController SensorSupply Air Smoke Detector LocationsReturn Air with Economizer Return Air Detector Shipping Position Completing Installation of Return Air Smoke SensorNone Unit Wire/Fuse or Hacr Breaker Sizing DataPwrd C.O EconoMi$er IV Occupancy Switch Adjust Factory-Installed OptionsPre-Start and Start-Up Install Accessories548J*14D 548J*14D Catalog No. II548J---07

548J*14D specifications

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